Since 2008 have found what I thought was a vent on the cowl of the later T models was the gas fill.The ones that don't have this you took the seat top off and filled the tank under you.The A-models 1928-1931 had a gas cap on top the cowl.1932 Ford went to a fuel pump and a rear tank.

Looks to be one of the last few years.1927 was last year of T model.Think the last two or three years came with the cowl vent.See the turtle deck as they called the back part.Pickups in Ts look like they just put the pickup box on instead of the turtle deck like this one has.